Spinning mechanism



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SPINNING MECHANISM Filed May' 27', 1943 April 1e, 1946,

April 16, 1946. R. B. METZNER 2,398,438

SPINNING MECHANISM Filed May 27, 194s e sheets-sheet 2 April 16, 1946. R. B. METZNER 2,398,438

sPNNING MECHANISN Filed'May 27, 194:5 v 6 sheets-sheet 3 INVENTOR April'l, 1946.

` R. B METZNER .SPINNING MECHANI SM e Sheets-sheet 4 Filed May 27, 1943 April 16, 1946. vR. B.- METZNER SPINNING MECHANISM Filed May 27. 194:5

6 Saheets-Sheet. 5l

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LL I 1 l NNN Patented Apr. 16, 1946 i l Wheeling ,Steel Cornretim W: Va., a corporation of Delaware Wheeling Y pplication `May 127, 1943, Serial N o. i claims. (c1. 11e-52X This invention relates tospinning mechanism in which rotating workis shaped by av spinning roll. In spinning; the work is rst heated and then mounted for `rotation and rotated rapidly, y

and during rotation of the. work aspinning roll is` brought into engagement with the work `and pressed thereagainst to vshape the work. Various hol-low metal articlesare formed by spinning, an example being .bomb casingswhich are formed ,from metal tubes cut into lengthsxthe tube ends being spun inwardly until they are closed or part'allyv closed. Y

Spinning machines have become fairly Well standardized so far as the characteristic move ments of the spinning riol'l relatively to the work are concerned. The spinning roll is customarily mounted on a carriage movable toward and from the work, such carriage' being in turn carried by an arm, the arm being mounted on and pivot-ally movablerelatively to a table which is travelable skilled operator and which cannot satisfactorily beperformed by `any control mechanism. ,Previous efforts have been made to` control the movements of a spinning roll relatively tothe work by control mechanism, but these havefailed. This has been due to the inability to overcome diiculties incident to variable factors such as fluid pressure, temperature of the work, quality of the steel, etc.V The skilled spinner, can; almost subconsciously, allowr` for suchA variables while the spinning operation is in progress and indeed it is because of theexistence of such factors that such high skill is required in spinning.

I have invented spinning mechanism compris ing control means for controlling the movements of the spinningroll relatively to the workwhreby the spinning operation may. be carried out entrely without the services of a skilled spinner and the results accomplished, are superior to those accomplished in manually controlled spinning because the human equation is eliminated., I have found that by my control mechanism I can controlthe opera-tion of `a spinning Folli in its shifting vmovements relatively to the work despite variable vfactors such vas fluid pressure, temperature of the work, quality of the steel, etc.

movements of the roll separately` by duid pressure means, valves beirm provided for controlling the delivery of `iiuid to eifect the various move? ments of the roll. The operation of the valves has been` performed manually by an 'operator known as a spinner. Long training and experience are required to develop a skilled spinner and from the standpoint of manual operation of the roll controllingvalvesthe spinning art is per# haps the most diicult of all themetal working arts. Skilled spinners are very highly paid.

Due to war conditions the demand forskilled spinners has increased While the supply has, de# creased. Various articles used in war arey made by spinning, such; for example, as bomb casings. as mentioned above. Y Articles such as thesey are in very largeV quantities and the spinning capacity of the steel industry in the UnitedStates has been multiplied, inv the last two orthreeyearS. Due to the lack4 of skilledspinners and the' great amount `of training required to, develop,` them great dimculties have been` encountered infops erating spinning plants, efliciency has been great# ly reduced and spoilageof work anddamage `to equipment has increased.

It has always been considered that control of the spinning roll in a spinning machine isan op` eration which must be performedA by a highly 55 I provide; in a spinning machine in which r0- tating work isshapd-by a spinning" roll, means for shifting the position of the roll relatively to the work anda control `device for controlling the shifting means so constructed and arranged as to repeatedly effect a predetermined sequence of movementsof the roll relatively to the work. I preferably employ `a control device comprising cyclically operable control means and connections between the control means and the means for shifting the spinning roll relatively to the work effecting a. predetermined `sequence of movements of the roll relatively to the v vorkupon each cycle of operation ofthe control means. I have found it desirable to employ cam means Vfor effecting control of the spinning roll and I ,preferably employ ak ser-ies of c ams each having connections for controlling one of the characterisr tic movementsof the roll as described above.

Ielso provide, ifi a spimiie .machine in ,which rotating Work is shaped by a spinning roll, a oo ntrol device, connections between the control device and the roll for shifting the ro ll relatively to the work upon operation of the control devicefand other connections lectiva*en the rollrand `the `control devic responsive to shifting movements of the roll for modifying the operation` ofthe iirst mentioned connections so that movements of, the roll relatively to tliework are determined cooprelatively to the work and other connections between the roll and the casing responsive to movements of the roll for moving the casing relatively to the valve so that movements of the roll relatively to the work are determined cooperatively,v

by the position of the valve and the position of the casing determined by the position of the roll.

Other details, objects and advantages of the invention will become apparent as the following description of a present preferred embodiment thereof proceeds.

In the accompanying drawings I have shown a present preferred embodiment of the invention, in which:

Figurel is a plan view of the portion of a spinning machine which includes the mechanism for controlling the operations of the spinning roll;

Figure 2 is an end elevational view of the mechanism shown in Figure 1 as viewed` from the righthand end of that figure, but to enlargedscale;v

Figure 3 is a fragmentary elevational view to further enlarged scale of a portion of the control mechanism shown in Figures land 2, Figure 3 being taken looking'toward the right from the left-hand end of Figure 2;

Figure 4 is a fragmentary elevational view of a portion of the mechanism shown in Figures l, 2 and 3, Figure 4 showing part of the control mechanism at the left of Figure 2 and at the extreme lower left of Figure 1 but as viewed from the right in Figure 2 'and fromV the upper portion of the sheet in Figure 1;

Figure 5 is a vertical transverse cross-sectional View taken on the line V-V of Figure 3;

Figure 6 is a vertical transverse cross-sectional A view taken on the line VI-VI of Figure 3;

Figure 7 is a vertical transverse cross-sectional view taken on theline VII- VII of Figure 3;

Figure 8 is a fragmentary elevational view to further enlarged scale of one of the iluid pressure valves as viewed from outside the valve casing;

' Figure 9 is a vertical cross-sectional view taken on the line IX-IX of Figure 8 and showingthe valve in the casing; 1

Figure 10 is a horizontal cross-sectional view taken on the line X+X of Figure 8; Figure 11- is 'an enlarged face View of the for controlling travel of the table; Figure l12 is an enlarged face view of the cam for controlling swinging of the arm on which the spinning roll carriage is mounted;

Figure 13 is a flow diagram showing the uid pressure lines from the valves to the cylinders for operating the spinning roll;and

Figure 14 is a diagram showing how the spinning rollis shifted relatively to the work durmg spmning. Y Referring now `more particularly to the drawings, there is shown a spinning machine comprising rotatable work holding means designated generally by reference numeral 2 which may be of standard `construction known to those -skilled in the art and hence is not described or illustrated in detail. The work holding means is rotated about Cam a horizontal axis and holds the work to be spun so that the work projects axially from the work holding means. In the illustrated embodiment the work is initially a steel tube 3 which is held by the work holding means 2 and projects from the right-hand end of the work holding means, viewing Figures 1 and 14. The Work is rotated about its own axis. The means for rotating the work holding means 21may also be of standard construction known to those skilled in the art and hence is not described or illustrated in detail. Before the work is spun it is preheated to a bright red heat as is standard practice in the spinning art. It isrotated at high speed, which may be in the neighborhood of 1000 R. P. M.

While the work 3 is thus held and rotated by the work holding means 2 it is acted upon by a spinning roll 4 which is adapted to be shifted relatively to the work during the spinning operation so as to shape the projecting end of the work. In the illustrated embodiment the projecting end of the work 3 which is initially in tubular form is spun into substantially closed pointed form as shown in Figures 1 and 14.` The specific example shown inthe drawings is of the spinning of the nose end o-f .a bomb casing. The shifting movements of the spinning roll '4 relatively tothe work must be carefully controlled and the spinningroll m'u'st move'back and forth over the Work generally/.longitudinally of the workvwhile at the same time it is advanced toward the axis of the work and also' axially of the work toward the left .viewing Figures 1 and 14. The movements of the spinning roll must be such as to generally shape the work into the desired ultimate form while avoiding prolonged continuous contact with any localized portion of the work,

as well known in the art. As above mentioned, theispinning roll iszcustomarily, and as shown in the illustrated embodiment, mounted on a carriage mounted for movement toward and from the work, such carriage being in turn carried by an arm, the arm being mounted on and pivotall'y movable relatively to a table which is travelable generally longitudinally of the work. The carria-geis designatedi, the arm is designated E and the table is designated 'I` in the drawings.

The spinning roll 4 is mounted on the carriage 5 upon a shaft 8 on which it is rotatable during the. spinning operation.` .The roll is not separately driven but is turned by contact with the rapidly rotating heated work. The roll shaft 8 is yjournaled in the carriage 5, which carriage is slidable back and forth from right to left and vice Versa viewing Figure 2. The carriage 5 slides in the armi whichhas" pivotal movement about a vertical axis A (see Fi'gures'l and 2), the arm being carried by the table I.` vThe'table 'I travels in the transverse or right and left direction viewing Figure '1; The sliding movement .of the carriage 5 on the armi-6, the pivoting of the arm 6 upon the table I and the travel ofth'ejtablel longitudinally of the work are all preferably, and asshown in the illustrated embodiment, accomplished by' fluid pressure means;l A fluid pressurecylinder 9 is mounted on the arm A lug I0 carried by the carriage 5 projects downwardly therefrom.` A piston in the cylinder 9 has its 'piston rod I I connected with the nlug ID at I2. Thus when iluid is admitted behind the piston in the cylinder 9 (i. e. to the right of suchpi'ston viewing Figure 2l the carriage 5 carrying the spinning roll 6 is advanced toward the left viewing that figure. Conversely, when fluid is'admitted -in front of the `onV the table 1 by a pivotal` mounting I4 which allows the cylinder to turn somewhat in opera@- tion.` The piston rod I5 of 'the piston inthe cylinder l is pivoted at I6 to a lug I'Icarried by the `arm E and projecting 'generally radially of the axis A. When fluid is admitted behindthe piston in the cylinder I3 (i. e. to the right of-s`uch piston viewing Figure 1) the arm 6 is `swung inV the counter-clockwise` direction about the vaxis A viewing that figure; Conversely, when huid is admitted in iront of the piston in the cylinder I3 (il e. tothe left of such pistonfviewin'g Figure 1') the arm is swung inthe clockwise direction about the axisA viewing that figure. A third cylinder 'lit is stationarily mounted relative'lyto the floor so that it has no movement@ The piston rod I 9 of the piston in the cylinder I8 is connected at Eil' to the table 1, which,*as above stated,`is mounted for travel longitudinally `or axially of the work (i. e; in the left 'and right direction in Figure l). When fluid iS admitted behind the piston in the cylinder I8 '(i. e.y to the right of such piston viewing Figurel) the table 1 carry; ing the arm 6 is" advanced toward the left viewing that figure. Conversely, when fluidis ad mitted in front of the piston in the cylinder I8 (i. e. to the left of such piston viewing lFigure l) the table 'I carrying the arm 6 is retracted toward the right viewing that ligure.

The mechanism above "described is standard and does not constitute my invention. Itwhas been described because a general' understanding of the operation of the spinning machineis neces-'- sary to an understanding of my invention, but the portions of the mechanism which have been described in general terms will not be more specifically lescribeandI are not shown in dee tail in the drawings because they are well known to thosev skilled inthe spinning art.

Mounted on the floor generally alongside the spinning machine proper is a housing 2l carrying a support 22 having bearings 23 in which is journaled for rotation a cam shaft 24. Keyed tothe cam shaft 24 to rotate therewith are three cams 25, 26 and 21. Mounted on the 'base, 28 of f chain 34 is trained about the sprockets 32 and 33. l

When the motor 29 is energized itdrives the cam shaft 24 through the mechanism just described. The cam shaft 24 rotates relatively slowly due to the interposition of the speed re# The respective cams 25, 26 and 21 are for conL trolling, through mechanism now to be described, the ow of fluid to the respective cylinders I8, I3 and 9 and, consequently, the movement of the carriage 5 relatively to the arm 6, the swinging of the arm 6 on the table 1 and the travel of the table 1 axially of the work. To this end each of the three cams 25, 26 and 21 operates a fluid pressure control valve. The casing for the valve op` erated by the cam is designated 35, the casing for the valve operated by the cam 26 is designated 36 and the casing for the valve operated by the cam 21 is designated 31. All three of the valves and casings are of the same general construction,

but the oasings as and as are, as will presently .al and. 4 2.

designatedV 5|.

appear. iim'o'urtl-ea fior 'movement consonant with tnetravel of tne'taole fr and the swinging or the f is designated-*as .ure easing 35. The casing has four'luid passages designated, respectively, 39,340', y The vpassage 39 olpens into an elongated passageway '43 as shown in Figure 9 which at `its upper `end communicates with the annular 'passage 44l and atV 'its lowerjrend coinr'nunicates with the annular passage 45. The passag'ao opensmtoan annular passage as. The passage 4I opens into-'an annular passage 41.' The passage 42opens-into an annular passage 48. the 'easn'gfi i's, liner 49 having ports 50 therethrough Clmunieating internally With Vthe br O'fthe eaSi-nigi. e. `Vthe interior 0f the lie) and external-ly with th'e'espective annular passages 46,41-and'481.

'me valve operates within the casing 3s The Valv'softhe Spool type and lis adapted to be i'noved axially of the casing, as will be apparent from Figure 9. The valve has; a StemA 52 2li-1d l'rib's 53. The Casing 35 has all el'tensri 54 having a cVty 554 Within which is disposed a cir'ipession'coil spring ewhicli bears against thenose of the valve Ellto urge the valve downwardly viewing Figure i9. 4'nos valve has `two rings or enlargements 51 and 58 which are spaced apart longitudinally of the valve a distance on centers equal to the longitudinal distance on centers between the ports 50 leading to the annular passages 41 and 48." 'nach of the rings el 'and 58 has a dimension longitudinally of the valve Srl'eivhat greater than the longitudinal dmen- 'sion of each of the ports 5i) so that when the valve is inthe eltialpostin as Shown in Figure 9 the ring 51 closestheports 50 communicating with the passage 41 and thering 58 closes the ports 53 communicating with the passagev 48. When the valve 5I is raisedwithin the casing, compressing the spring 56, untilthe ring 51 uncovers the ports ommuhieti'ng with the passage 41 and the ring 58 uncovers the ports communicating with the passage 48 this will result in communication between the passages' 46 and 41 and communication between the passages 45 and 4S. Conversely, when the valve 5I is lowered Within the casing, allowing the spring 5K6 to expand, until the ring 51 uncovers .the ports communicating with the passage 41 and the ring 58 uncovers the ports communicating with the passage 48 this will result in communication between the passages 45 and 48 and communication between the pasasges 44 vand 41.

The passage is' connectedwith a source of yfluid pressure mot shown). This may, for oxarnple, bean oil pump maintaining a substantially constant headf oil, in'which case the passage 40 is eonnectedhwith the high pressure side of the oil pump. 'hepas'sage' 39 is connected with the lowpressure side of the oil pump. The passage 4l is connected vwith theoylinder i8 in front of the piston therein (see Figure 13). The passage 42* is connected with the cylinder Is behind the piston therein. When the valve is in the neutral position as shown in Figure 9 oil does not W t O1* from the Cylinder I8 beCaliSe the passages 4| and i which oommuruoate with the cylinder are closed by the respective rings 51 and 58.v When the valve moves upto allow communication between the passages 46 and 41 oilflows from the high pressure side of the oil pump throughthepassages 40, 46, 41 and 4| and enters the cylinder I8 in front. of the piston therein. At the same time the oil line from behind the piston inthe cylinder i8 and which is connected with the passage 42 is through the passages48, 45, 43 and 39 brought into communication-With the low pressureA sidefof the oil pump so thatV oil -flows out from behind the piston and the piston -moves from4 left to right viewing Figures 1 and 13.' ,When the valve moves down to allow communication between theV passages 46 and48 cil flows from the high pressure side of the oilpump. through.- the passages 40,446,48 and 42 and entersthe cylinder I6 Ybehind thepiston therein. -At the same time the oil line from in front of tlfiapistoniinV the 'cylinder I8 and which is connected 4with the passage 4| is through the passages 4-1., 44, 43 and 39 brought into communication withthe low pressure side of the oil pump so that Voil flows out from the iront of the piston and the piston moves from right to left viewing Figures 1 and 13. v' L Thus movement of the piston in the cylinder I3 is controlled by the relative positions of the valve 5| and the casing 35; when the-valve moves upwardly relatively to the casing from theneutral position shown in Figure 9 the piston in cylinder |8 -moves toward th'e right viewing Figures 1 and 13 and when the valve moves downwardly relatively to the casing from the neutral position shown in Figure 9 the piston in cylinder I 8 moves toward the left viewing Figures 1 and 13.

The pistons in cylinders laand 9 are controlled in exactly similar manner by the operation of the valves in the casings 36 and 31, respectively. Each of the valve casings-has communication with the high pressure side of th'e oil pump, the low pressure side of the oil pump and both ends of the cylinder which it controls. Thus by appropriate control of the valve in the casing '36 the arm 6 may be swung back vand forth about the axis A and by appropriate control of the valve in the casing 31 the carriage 5 may be advanced toward and retracted from the work along the arm 6. It will be noted in Figure 13 that exible connections with the cylinders 9 and |3v which move during operation of the spinning machine are in dicated at 59, such connections being shown as rubber or similar iiexible hoses connectedl with pipes 63 leading to the valves. Similarly, since in operation of the spinning machine the valve casings 35 and 36 also move, as will presently be dei scribed, flexible connections 6| from the pipes to such valve casings are also sh'own.

As shown in Figures 3 and 5 the cam 25 directly underlies the valve casing 35 and-the'valve therein, asshown in Figures 3- and 6 the cam 26 directly underlies the valve casing 36 and the valve therein, and as shown in Figures 3 and 7 the cam 21y directly overlies the valve casing 31 and the valve therein. Each of the valves in th'e casings 35 and 36 is spring pressed downwardly toward the .corresponding cam and-.the valve in .the casing 31 is spring pressed upwardly toward the cam 21. l

`Pivoted at 62 to the stem 52 of thevalve 5| in the valve casing 35 is a pair of links 63 through whose lower ends passes a pin-64. Rotatably mounted on the pin 64 intermediate the links63 is a cam following roller 65 v(see Figure) which at all times is pressed downwardlyupon andiollows the cam 25. The valve casing 3.5 is bolted toamounting 66 by bolts 61. VProjecting downwardly from the mounting 66 is a bifurcated bracketv 68 carrying at its lower extremity a pin 69. Links 16 are pivoted to the pins 69 and 64 as shown in Figures 3 and 5. 'Ihis construction allows the roller 65 to follow the cam 25 without binding or the tendency to impart sidewise stresses to the valve stem 52. While the angularity of the links 63 changes slightly during operation of the spinning machine, such change in angularity does not deleteriously aiect the operation of the valve. y

:The connections through which the cam 26 operates the valve in the casing 36 are exactly analogous to the connections through which the cam operates the valve in the casing 35 as just explained. Pivoted at 1| to the stem 12 of the valve in .the casing 31 is a pair of links 13 through whoseupper ends passes a pin 14. Rotatably mounted o n the pin 14 intermediate the links 13 is a cam following roller-15 (see Figure 3) which atrall times is pressed upwardly against and follows the cam 21. Therhousing 2| carries a bracket 16 to which is pivoted at 11 a lever 18 through which the pin 14 passes as shown in Figure 7. The end of the lever forms a handle 19 which, if desired, may be operated manually to move downwardly the valve in the casing 31. As will-be seen from Figure 13, bearing in mind that the structure of the casing 31 and the valve therein is-to all intents and purposes the same as the structure of the casing 35 and the valve 5| th'erein as shown in Figures 8, 9 and 10, when the Valve in the casing 31 is moved downwardly communication is established between the high ,pressure side of the oil pump and the front of the piston in the cylinder 9, the eiiect of which is to move the spinning roll 4 back away from the work. Thus. the handle 19 may be used in emergencies or to supplement th'e automatic operation of the mechanism when necessary or desirable to move the spinning roll to inoperative position relatively -to thework. Ordinarily manual operation of the spinning roll is unnecessary and the valve in the casing 31 is controlled by the cam 21 through the roller 15 and links 13. As explained above, contact between the roller 15 and the cam 21 is maintained at al1 times by a spring pressing upwardly against the valve in the casing 31 analogous in function to the spring 56 which presses downwardly against the valve 5| in the casing 35.

Means are provided for moving the valve casings 35 and 36 consonantly with movements of the table 1 and the arm 6, respectively, so that movements of the spinning roll 4 relatively to the work are determined cooperatively by the control means and the position of the roll. The mounting 66 carrying the valve casing 35 (Figure 5) is slidable vertically in guideways 86 in the housing 2| so that the casing 35 may move vertically up and down relatively to the housing and coaxially with the valve 5|. Mounted atop the housing 2| on a stub shaft 8| is a sprocket 82. Connected with the top of the mounting 66 and extending about and meshing with the sprocket -82 .asv shown in Figure 5 is a sprocket chain 83.

Also carried by the housing 2| is a stub shaft 84. carrying a-sprocket 85. Extending about the meshing with the sprocket 85 as shown in Figure 4 is a sprocket chain 86. A link 81 connects the sprocket chains 83 and 86 as shown in Figures 4 Eand 5.v Connected with the end of the sprocket chain 86 is a rod 86 having an adjustable connection 89 with another rod 90, the rods 88 and 90, together with the adjustableV connection 89 constituting in effectalink of adjustable length. Such' linkis-.pivoterlat 9| to a short link 92 which in turn is pivoted at 93 to a transverse link 94 swingable abouta vertical pivot pin 95 in a stationary base 96. 'I'heopposite end of the link 94 is pivoted at 97 to a link 98, which in turn is pivoted at 99 to the table 1.

Connected with the top of the extension 54 of the casing 35 is a rod |00 which enters a cylinder IOI mounted atop the housing 2|. The rod |09 carries, a piston |02 tting within the cylinder |I. Air under pressure is during operation of the spinning machine continuously admitted to the top of thevcylinder |0| behind the piston |02 through a pipe |03. Thus the casing 35 is at all times urged downwardly viewing Figure and the sprocket chains 83 and 85 and the links 88-90 and 92are maintained in fully extended position as shown in Figure 1. The sprocket chains and links act only in tension and not in compression.

When the cam 25 turns in the clockwise direction viewing Figure 5 as indicated by the arrow in that figure and the roller 65 passes from the bligh portion of the cam as shown in Figure 5 to a lower portion thereof the valve 5I moves downwardly in the casing 35, resulting in the admission of ,oil under pressure behind the piston in the cylinder I8 and,4 consequently, advancement of the table 1 from right to left viewing Figure 1. The extent of downward movement of the valve 5| is determined by the cam 25. As the table 1 moves toward the left viewing Figure. 1 it causesthe link 94 to swingv about the pivot 95 in the counter-clockwise direction viewing Figure 1 since the pivot is stationary and the table moves. This allows. movement generally toward the left viewing Figure 1 of the links 88-90 and 9| and consequent downward movement under the action of the` air behind thepiston |02 of the valve casing 35. The result is that after. a given downward movement of the valve 5| in the casing 35 which causes a` movement of the table 1 toward the left viewing Figure I, and while the roller 65 is riding on a circular portion ofthe cam 25 the casing4 35 moves downwardly andn effect catches upy with `tllevalve5`l, thus bringing the valve into neutral position relatively to the casing as shown in Figure 9` andv interruptingfthe now of uid to and from the cylinder I6. The` result is that the piston in ,the cylinder I8 and thev table 1 connected. therewith are maintained temporarily in a new for advanced position relatively to the positionthey occupied' prior to downwardv movement ofthe valve followed by downward movement of the casing, Then when. the roller 65 descendsv onto a still lower portion `of the cam 25 the valve 5I moves downwardly still farther,

.resulting in` an additionalmovement of` the table 1 toward the left viewing Figure 1, and that movement in turn causes downward` movement of the casing 35 as. above explained. In this way through proper design of thevcam 25 the table `1` can be. and ,is caused tomove step by step from right to leftviewingFigure 'las the spinning progresses.` At thelendv ofthe spinning operation the roller ridesup from'thelowest portion of the cam 25 onto thev highest.V portion thereof and the table 1 returns in acontinuous movement toward the right to. its initial position., This controly mechanismV eictsf'the. desired control of movement of the, tablet 1T despite uctuations. in the` pressure.v o fV theoi-lother variablel factors.

theyalvezcasingwhch causes the:` valve casingrto in eiect follow up the valve step by step during;

the spinning operation `thetable can be positively advanced in any desired. number of steps and maintainedin predetermined` positions for desired periodszof time; dependent upon the design of the camfZS.

- TheA swinging movementvof'thearm S'is controlled@ by the; cam; 26:V` precisely analogously to the control; of; thef'travel" ofthe table 1 as just explained. The mounting; |04 carrying the valve casing:` 3,6 (Figure-"61E is ,slidable' vertically in guidewaysi; |05. in the housing 2'I so that the casing .36 .l may/moveA vertically up and down relatively to the `housing and.y c'oaxially with the valve that casing.. Mounted atop the housing as-shown infliguresii ando?. 'The structure of:

the adjustable-link |172 isssimilar tothat of the adjustabley linkv 88-9 0f shown: in. Figure l; and its` structure isi clearly shown: Figure' 6. The sprocket;A chain/I Ill i's'lconnected' a't- IlI3iy (Figure 4) withanother sprocketlchain-Iil'4l whichlmeshes with a sprocketl |5` and also has: its end fastened! t0 the Sprocket 'II-5 aii-lff CsefFguflB's- 1v 3.111131'.

The sprocket IIS-flies in?4 ai horizontal plane: and

is` mounted on astuhl shaft IIT carried by a bracket 'I |8l projecting outwardly from the housing 21 as shown Figure' 11l;- Fastto the' sprocket II5 -as always to= turn therewith and projecting;v outwardly radially'o the shaft I I1 iisg arm is pivcted at |21 wan-farinr-zzjof aten crank-V l'ever; I23 p ivotally carried yea-pin |241 (Figure 2) mountedin-thestationrybase 96 and co-A axial with the vertical pivot' pin 495.` The bell crank lever |23 has` another arm V|25 towhich is pivoted at- |28' toalugr |29 ,carriedA by the a1'm6; i i

Thevalve casing 36 is-normallyurged downwardly` (Figure 6")--byM` means l|30A` exactly" an` alogous to theY corresponding means forV urging downwardlyjthey valvel casing-35 (Figure- 5 asdescribed'inv detail above. Thus the rollerf I`3`I- (Figure` 3). which" cooperates with the cam: 26 analogously to the' manner in which the roller 65 cooperates withV theV cam* 25, is-at all'times maintained incontact 'with that cam, and -the linkage justdescribed for connecting the valve casingi 36 with` thej'arm V8 isfmaintained' in` tension. f

When the' cam 26 turnsiinithe clockwise direction asindicated by thearrow--in Figure 6 theV valve inthe casing 361will be caused to move alternatelyup and down as will be apparent upon consideration off the contour of the cam 26 (see Figure 12). forth swinging movements of-'the arm 6'; The linkage just` described forv connecting the valve casing 36'with the arm I causes the'valve casing to follow up the movements ofthe valve causedr by the cam 26 so that the" back andforth swinging movement of. the arm 6 Vmay be accurately and predeterminedly` controlled despite fluctua- Due to. the., crmrmutions...r between: the tatie and, 'ze tions Vin 0111. pressure' and'fother" variables "Which This ywill result in back and Votherwise might be diicult 'or impossible to compensate for. Y

As above mentioned, the valve casing 31 within which operates the valve controlled by the cam 21 is not movable as are the valve casings 35 and 3B but is stationarily mounted. The function of the valve which operates in the valve casing 31 is simply to move the carriage 5 carrying the spinning roll 4 along 'the arm 6 toward and from the work. When a high part of the cam 21 is in engagement with the roller 15 the valve in the casing 31 is in its lowermost position and the piston in the cylinder 9 is retracted to move Vthe spinning roll away from the work. When the roller 15 contacts a 10W portion of the cam 21 the valve in the casing 31 moves upwardly,-uid under pressure is admitted behind the piston in the cylinder 9 and the spinning roll 4 is advanced into contactv with the work. As will be seen from the design of the cam 21, during the greater portion of the cycle of that cam the spinning roll ispressed toward the work. Indeed,'during the entire operative portion of the cycle that is the case, the roll being withdrawn from engagement with the work at the end of the spinning operation on a particular workpiece. As has been explained, the Ythree cams 25, 26 and 21 are all mounted on the cam shaft 24 so that they rotate together. During the spinning operation they simultaneously control the movement of the carriage toward the work, the swinging movements of the arm `6 and. the travel of the table 1. The spinning roll-thus partakes of a composite movement as it at times is simultaneously Vmoving radially toward thev work, swinging about the axis A'and traveling axially of the work. VThe precise movements of the roll will -be determined by the contours of the cams 2-5, 26 and 21. It is to be understood that the cams may be designed to meet any particular situation and to bring about any desired movements of the roll which may be desired in spinning Va workpiece into a particular nished form.

Figure 14 shows rd iagrammatically how the spinningroll 4 is moved during the spinning operation. The workpiece 3 is originally of full tubular form as indicated in fulllines in Figure 14. The spinning roll 4 is initially movedV towardlthe workpiece Yfrom theV full line position designated a along the line `X lto the dotted line position b, deforming the end of the blank into generally frusto-conical vshape as indicated by the dotted'line Y. The rollithen4 commences to partake of back `and forth swinging movements brought about by swinging of the arm B about the axisA (Figure 1) and it successively assumes' the positions indicated at cV and d in Figure 14. During the-swinging movements the table 1 travels toward the left. The result is the reshaping of the end of'a'workp'iece to the contour indicated by the dotted line Z in Figure 14 and also shown in full lines yin'Figure 1. 4

Turning'of the cam shaft 24 is, as mentioned above, eiected by operation of the electric Vmo'- tor 29. The motor is preferably started 'by the manual closing of a switch after a new preheated' workpiece has been set in place and clamped in the rotatable work holding means 2. The motor may bek stopped manually or by a'limit switch associated in any convenient manner with the mechanism so as to open themotor circuit at the end of thev predetermined cycle of'movements of ythespinning roll. A limit'sWitch V132 (Figures 3,

6 and 121) maybe mounted adjacent the' Cam'zj and may be operated' by a lug' 133 fastened to the cam byV bolts I34"pa`ssing'thru'gh' an arcuate slot |35.' "The lug may be'adjustably positioned as desired on the cam. As mentioned above, the circuit may be' closed 'manually -and it may be opened at the end sof a 'revolution of the cam shaft 24 byoperati'on" ofthe limit switchfl32 by thelugl33. "Y

While I have shown--aid-described a present preferred embodiment offtlje' invention it is to be distinctly understoodthat the invention is not limited thereto but may be otherwise variously embodied withinY the scope of thefollowing claims. 5"

I claim: Y

1. In a spinning machine in which rotating work is shaped by aspinning roll, means for shifting the roll relativelyto the work, a fluid pressure valve casing, a valveV movable in the casing, means mounting the casing for movement relatively to the valve, fluid connections between the casing and said shifting means opn erable when the valve is in one position relatively to the casing to admit fluid to shift the roll relatively to the work and other connections between the roll and the casing responsive to movements of the roll for moving the casing relatively to the valve so that movements of the roll relatively to the work are determined cooperatively by the position of the valve and the position of the ycasing determined by the position o Ythe roll.`v

2. In a spinning machine in which rotating work is shaped by a spinning roll, means for shifting the yroll relatively to the work, a fluid pressure valve casing, a valve movable in the casing, means mounting theA casing for movement relatively to the valve, control means for moving the valve, fluid connections between the casing and said shifting means operable when the'valve is in one position relatively tothe casing t0 admit uid topshift the roll relatively to the work. and other connections between the roll and the casing responsiveto movements of the roll Yfor movingfthe casing relatively to the valve so that movements ofY thefroll Vrelatively to the work are determined cooperatively by the control means andthe 'position ofthe roll.

3. In a spinning machine in which rotating Work is shaped byv a spinningroll; Ymeans for 50 shifting the roll relativelyto the work, a control device'comprising a fluid pressure valve casing, a valve movable inthe casing, vmeanspmounting thevcasing ,for movement relativelyto'the valve,A

` other connections betweentherroll and the casingresponsive tomovementsof. the roll formovmathe casing :entirely tothe; valve.. the @Qontrol device eiecting ia. predetermined sequence Voi movements of the rollrelatively to rtheyvork upon each cycle of. operation of ,the control means.

4. In as'pinningV machinefin'iwhich rotating work is shaped bya spinning roll, means for shifting'the roll relatively to the work, a control device comprising a luidpressure valve casing, a valve movable in the casing,A means mounting the casing for movement relatively to the valve', rotatable cam means' for InQYingthe valve,' fluid connections between thecasing and asaidfshifting meansoperable when the valvey is ,one position relativelyl to the ca vsingtojadmit'iljuid to` s hlft the roll relatively vto the work and other connections between the roll and the casing responsive to movements of the roll for moving the casing relatively to the valve, the control device effecting a predetermined sequence of movements of the roll relatively to the work upon each rotation of the cam means.

5. In a spinning machine in which rotating work is shaped by a spinning roll, means for shifting the roll relatively to the work, a control device comprising a plurality of iiuid pressure valve casings, a valve movable in each casing, means mounting the casing for movement relatively to the valve, means for moving each valve, fluid connections between each casing and said shifting means operable when the corresponding valve is comprising a plurality of uid pressure valve cas ings, a valve movable in each casing, means mounting the casing for movement relatively to the valve, a cam shaft, a plurality of cams on said shaft, connections between each cam and one of the valves for moving the latter upon rotation of the shaft, iiuid connectionsbetween each casing and said shifting means operable when the corresponding valve is in one position relatively to the casing. to admit uid to shift the roll relatively to the work and other connections between the roll and at least one casing responsive to movements of the roll for moving that casing relatively to the corresponding valve.

7 In a spinning machine in which rotating work is shaped by a spinning roll, means for shifting the roll relatively to the work, a fluid pressure valve casing, a valve movable in the casing, means mounting the casing for movement relatively to the valve, fluid connections between the casing and said shifting means operable upon movement of the valve relatively to the casing in one direction to deliver uid to move the roll in a corresponding direction and other connections between the roll and the casing responsive to movements of the roll in said corresponding direction to move the casing in the same direction as the direction of said movement of the valve to terminate said delivery of fluid.

8. In a spinning machine in which rotating work is shaped by a, spinning roll, means for shifting the roll relatively to the work, a fluid pressure valve casing, a valve movable in the casing, means mounting the casing for movement relatively to the valve, fluid connections between the casing and said shifting means operable upon movement of the valve relatively to the casing in one direction to deliver fluid to move the roll in one direction and upon movement of the valve relatively to the casing in the opposite direction to deliver fluid to move the roll in the opposite direction and other connections between the roll and the casing responsive to movements of the roll to move the casing in the same direction as the direction of movement of the valve causing each movement of the roll to terminate delivery of fiuid to move the roll.

9. In a. spinning machine in which rotating work is shaped by a spinning roll, means for shifting the roll relatively to the Work, a fluid pressure valve casing, a valve movable in the casing, means mountinguthe casing for movement` relatively to the valve, and control means comprising cyclically operable means for moving the valve back and forth relatively to the casing, fluid connections between the casing and said shifting means operable upon movement of the valve relatively to the casing in one direction to deliver fluid to move the roll in one direction and upon movement of the valve relatively to the casing in the opposite direction to deliver uid to move the roll in the opposite direction and other connections between the roll and the casing responsive to movements of the'roll to move the casing in the same direction as the direction of movement of the valve causing each movement of the roll to terminate delivery of fluid to move the roll, the control means effecting a predetermined sequence of movements of the roll relatively to the work upon each cycle of operation of the valve moving means.

10. In a spinning machine in which a rotating tube is shaped by a spinning roll, a control device, connections between the control device and the roll for shifting the roll relatively to the tube upon operation of the control device and other connections between the roll and the control device responsive to shifting movements of the roll `for modifying the operation of the rst mentioned connections so that movements of the roll relatively to the tube are determined cooperatively by the control device and the position of the roll.

ROBERT B. METZNER. 

